OPK 

Orland Park Killas, although they kill nothing, they're a group of rag tag teens who vandalism and do ignorant hood rat activities in the suburb of Chicago know as Orland Park. Widely hated by most everyone, OPK believes they are "Savages" and are often found spouting nonsense talking about their "Squad". They are mostly all white, but act black and think they are ghetto

"Bro did you see OPK knock that old lady's garbage can over?"

"Be careful out in Orland Park, OPK might threaten to do something to you"
"Woah dude did you hear OPK talk back to their teachers!"

OPK by HoodLuicifer February 2, 2015

OPK 

One position kill
Hack in fps games which lets a person kill everyone without moving, due to everyone vaccumed in front of him. Generally used by people who can't play.

Person 1: zomg opk
Person 2: kick him
Person 3 (hacker): WTF

OPK by kaldoscope October 13, 2009

OPK 

Other People's Kids. Simple as that

I love my kids to death, but I usually feel the need to strangle OPK's.

OPK by yankeemofo March 11, 2009

OPK 

one punch knockout; to knock someone unconscious with one punch

"you should have been at the club yesterday, LD fully OPK'ed this guy cause he made fun of his sideburns"

OPK by mikemikemikeee February 5, 2008

OPK 

Ovulation predictor kit

While trying to conceive a baby you take an OPK so you know when you're ovulating.

Yay I got a positive OPK!
Sad day I got a negative OPK.

OPK by IamwhoIam... September 21, 2011

opk 

Over Privileged Kid. The kind that gets designer clothes for their layette set, wears those special-edition Pampers, and is taught from the moment they're born that they hung the moon, they are a Special Case, and the world revolves around them.

Can be identified by their tendency to scream as if being disembowelled when they are denied something they want. This trait can--and usually does--last a lifetime.

Nobody wants to play with Jordan, she's such an OPK.

opk by orinoco womble August 4, 2010

OPK 

Fortnite Clan that stands for One Position Kill

Im Going To Join OPK

OPK by StraightQuan June 1, 2019